Analysis and discussion on testing methods of broken rock zone of surrounding rock of roadway

• Published in: Gong kuang zi dong hua = Industry and mine automation Vol. 40; no. 1; pp. 38 - 41
• Main Authors: CAI Guannan, LI Zhonghui, YANG Yulong, KANG Junliang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Industry and Mine Automation 01.01.2014
• Subjects: acoustic method; boreho; broken rock zone of roadway; geologic radar method; multi-point displacement measurement method; multi-point stress measurement method; resistivity method; seismic wave method
• ISSN: 1671-251X
• DOI: 10.13272/j.issn.1671-251x.2014.01.011

The paper introduced different testing methods and testing theories for broken rock zone of surrounding rock of roadway, discussed and analyzed advantages and disadvantages and scope of application of the different testing methods. By comparison, it got conclusion as follows: technology of the acoustic method is advanced and testing method is simple, but it is difficult to be applied in soft rock; the multi-point displacement measurement and the multi-point stress measurement can be applied for real-time monitoring of surrounding rock displacement or stress, but the accuracy of measurement is limited; the seismic wave method has high testing precision, but its equipment is expensive and complicated to install; the geologic radar method without drilling is a non-destructive testing method, but testing cost is high; the resistivity method has a high requirement in the precision of instrument and arrangement of electrodes; image resolution of the method of borehole camera is limited by harsh environmental condit